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Advanced Programming Techniques in D

Modifying the Value of a Pointer

Explore how to modify pointer values in D through increments and decrements that adjust the memory address safely. Understand the automatic scaling of pointer arithmetic by variable size and identify cases that lead to undefined behavior. Gain practical knowledge of using pointers with arrays and slices to maintain valid memory references.

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Pointer value modification

The values of pointers can be incremented or decremented, and they can be used in addition and subtraction:

D
import std.stdio;
void main() {
    int variable = 20;
    int *ptr = &variable;
    writeln(ptr);
    ++ptr;
    writeln(ptr);
    --ptr;
    writeln(ptr);
    ptr += 2;
    writeln(ptr);
    ptr -= 2; 
    writeln(ptr);
    writeln(ptr + 3); 
    writeln(ptr - 3);
}

Different from their arithmetic counterparts, ...